What part of the English language are you having difficulty in understanding???....(I have put in UPPER CASE 'BOLD' and in RED so you can read better)
U.S. Constitution - 14th Amendment
. "ALL PERSONS BORN or naturalized IN THE UNITED STATES, and subject to the jurisdiction thereof, ARE CITIZENS OF THE UNITED STATES..."
One can go on and quack about parent's citizenship and such, but you are NOT going to get any court in the land to declare a candidate BORN IN THE UNITED STATES to be ineligible to run for President!
I agree, with this caveat: If a person running for POTUS were to have parents born on foreign soil, and whose parents could be shown to have allegiance to a foreign government (especially one deemed to be unfriendly to the U.S.), that person could be deemed ineligible to run.